What did Satan do to the Led Zeppelin guys in that little tool shed?

I’m referring to the infamous back-masked passage from Stairway to Heaven:

Oh here’s to my sweet Satan
The one who’s little path
Would make me sad
Who’s power is Satan?
He’ll give those with him 666
There was a little tool shed
Where he made us suffer Sad Satan

??? What the heck did he do to them in the tool shed!? I always wondered about that.

Build A Tool Shed